Blade honing or sharpening machine.



H. CHRISTIANSEN. BLADE HONING 0R SHABPBNING MACHINE.

APPLICATION FILED FBB.8, 1912. ,(j),34,422,y Patented Aug. 6, 1912.

4 SHEETS-SHEET l.

H. GHRISTIANSEN. BLADE HoNING 0R SHARPENING MACHINE.

APPLIUATION FILED FEB. 8, 1912. 1 ,084,422. Y Patented Aug. 6, 1912.

W f3 4/ MW@ v l 2 H. GHRISTIANSEN. BLADE H oNING 0R SHARPENING MACHINE.

APPLICATION FILED PERB, 1.912. 1,034,422. PatentedA Aug. 6, 1912.

4 SHEETS-SHEET 3 /aa a5 mi H. GHRISTIANSBN.

BLADE KONING 0R SHARPENING MAGHINE. APPLIUATION FILED mlm, 1912.

1 ,034,422, Patented Aug. 6, 1912.

HANS onnisr'rAn'snN, or Bnnronn, MASSACHUSETTS, Assi-anon, 'ro Bnnrenn A Razon COMPANY, or nnnronn, raAssAcreusnr'rs, A connor-meren or rane..

onusnfr'rs.

insane?.

To dll-who7n'ii may concern: v

Be 1t known that I, HANS CHRrs'rrANsnN,

.a citizen of the United States, and a resident those conimonlyused in safety razors.

A The invention has for its object to proifilde an automat-icv machine adapted to accurately hone a each Ablade being first held for a predetermined period With the edge portion of one of its sides in contact with a honing cylinder, and. thegroup bf blades vbeingA then simultaneously separated from the cylinder,

. inverted from the honing position While separated from the cylinder to cause the sides which previously faced inwardly and more on the cylinder, to face outwardly from the cylinder, and finally held again in con- .tact With the cylinder with the sides which previously faced away from the cylinder facing toward it, so that the edge portions of both sides of the -gro-up of blades are successively presented to the cylinder.

The invention consists in the imp/rovements which I` will now proceed to describe and claim.

.Of the accompanying drawings Figures land 2 representplan views of parts of a niachinecons'tituting an embodiment oftniy invention, Fig. 1 showing the machine from one end to the transverse center, While Fig.

2fshovvs the machine from the transverse center to the-opposite end; Fig. 3 represents -an-,I'endivievv of the machine; Fig. 3fL represent perspective view of the rocking arms herei-af'r described, Fig. 4 represents a side View of a portion of the machine Fig. 5 represents a section on line 5-5 of Fig. 1; Figs. fot and 6 represent vievvs;4 similar to Fig. 5,y showing the' operation of. inverting 'the blades Fig. 7 represents a section on line 7-7 of Fig. 1; Fig. 8 represents a `fragmentary section on line 8--8 ofFig. 2; Fig. 9.1epresents a perspective view of one ofthe rotary bearing blocks hereinafter described; Figs. 10 and 11 represent plan views of lparts of a machine constituting another embodiment of the invention, Fig.

i Specicationof Letters Patent.

Application area February s, 1912.

plurality of` blades sinniltaneously,

BLADE HONING OR SHARPENING lHNE.

Serial No. 37e/Wl.

- 10 showing one end'portion and Fig. 11 the opposite end portion; Fig. 12 represents an end vieiv of the machine; 13 represents a rear side elevation of a portion of the chine; Fig. lll represents a section on line 14--14 of Fig. 10; Fig. 15 represents a section on line 15%5 of Fig. 10; Fig-.16 represents a vieivsiinilar to Fig. 12 showing a different stage of the operation; Fig.- 17 represents an enlargement of portions of Fig. 14,; Fig. 18 represents a section on line 18-18 of Fig. 14; Fig. 19 represents a modified forni ofblade holder. Fig. 20

represents a section on line 20--20, of Fig.

11, the parts being in position shown by Fig. 15; Fig. 21 represents a `section on line 2020'of'Fig. 11, the parts being in position shown by Fig. 16.

rihe same reference characters indicate the same parts in all the fignres.

Referring first to Figs. 1 to 7, inclusive, 12 represents the base of the frame of the machine having bearings for the several shafts hereinafter described. 13 represents the driving shaft which extends lengthwise of the base. 14 represents a grinding cylinder which may be of any suitable material adapted to produce a tine edge on razor blades 15 bearing on its periphery. The

.cylinder 14- is attached to a shaft 16 jourtached to a shaft 20, the cylinder being thus alternately held in a raised position 'While 'i' -JHTV .r-' f1 trattenne@ (o, i212.

acting on the blades, and in a depressed position While the blades are being inverted to present fresh sides to the cylinder. The shaft- 20 is provided With gears 21 meshing with gears on the driving shaft 13. rlhe shaft 16 and cylinder 14E are preferably reciprocated longitudinally to distribute the AWear of the periphery of the cylinder, by means comprising a lever QBfulCrumed at 2Li- (Fig.A 2) to the base 12, a cam 25 on a shaft .26, said cani engaging a pin 27 on one arm of the lever 23, and a grooved collar 28 attached to the cylinder shaft 16, the groove of said coliar receiving a pin 29 attached to the other arm of the lever 23. A spring 30 (F ig. 2) attached to the base 12 and to the lever holds the pin 27 against the cam 25, said cam being formed to cause the lever to oscilla/te in a horizontal plane and thus representtheedge portions of the inwardly'.4 v facing sides` of the blades to the' grinding cylinder, as shownby Figs. 3, 5 and 7, for

ciprocate the shaft 16 and lcylinder 14 longitudinally. The shaft 26 has a gear 31 meshing withl the gear 22'on the driving shaft 13. The cylinder may be rotated by a driving belt (not shown) running on a pulley 32 (Fig. 1) attached to theshaft 16, said belt' being adapted to conform to the above described vertical and longitudinal movements ofthe cylinder shaft.

sharpen a plurality of safety razor blades 15 simultaneously,the blades being detachably grasped by holders which are adapted' to a predetermined period .untilfthe edge portions of saidI inwardly facing sides are honed or completed. The blades are then, in this v embodiment of the invention, inverted by a.

sidewise swinging movement away from the ,cylinder through an arc of about 180 degrees to thevpositionshown by Fig. 6 so that their completedside's face outwardly,

the inverted blades being finally swung edgewise through an additional arclof 180 def grees to present their now inwardly facing and 'unfinished sides to the cylinder. During the edgewise swinging movement of the 'ing then raisedr to vcontact with the blades, as shown byFigs. 3, 5, and 7.

Each blade holder is composed of-an arm jaw 34. To the .arm 33 is pivoted at .35 a jaw 36 having an arm which is'pi'essed by a spring 37 tov force the jaw 36 yieldingly toward the jawA 34, so that a' blade 15, having fiat parallel sides, inserted bet-ween the aws, is grasped yieldingly thereby, stops 38 being provided to bear on the edge of the blade' inserted between the jaws, and insure the j 45 proper projection of the opposite or cutting edge from the jaws. Eacharm 33is connected by a horizontal pivot 39 to a rotary bearing block 40 (shown separately by Fig. 9)- said block having a vertical trunnion 41 journale'd in a bearing arml 42 attached to a supporting: rod 43 which is rigidly supported by fixed standards 44, Figs. 4, 5 and 6, on the base 12. Thearm 33 is adapted to plane on the pivot 39, as

, swing in a vertical indicated by Figs. 5, 5a and 6, to invert the blade held thereby, the blade beingmoved from the position shown by Fig. 5 to that shown by Fig. 6. The first part ofV this swinging movement is caused by the means 60 next described.

46, 46 represent cams vlocated at opposite ends of the machine, as` shown by Figs. 1 and 2, said cams being attached to the ends of the shaft 26 and rotatedin he direction indicated by the arrow, Fig. Each cam The ymachine is' organized to hone orblades the cylinder is held in' a depressed position, as shown 'by Fig. 8,'*until the blades; are in position to be honed, the cylinder be-l has the contourshown by Figs. 3, 5, 5a and tangential portion 46". Said cams support rocking arms 47- liaving pivot studs 4891" igs. 1 and 3a, which are journal'ed in fixed bearings in the end standards 44, the two roeking arms being connected by alifting bar 49 adapted to lift the series of knife holders, as

' indicated by Fig.` 5,'s'aid bar having a se- -ries of adjustable bearing screws 50 on which honed and', when they are being raised, as

When the lconcentric portions 46d of the `cams are in contact with the rocking arms,

position and the knives bear on the grinding cylinder. When the tangential portions 46b of the cams reach the rocking arms, the liftingl bar and the'knife holders are swung uplmif'e holders are moved slightl)1 beyond a tion to the lhorizontal position shown by blades, .their descent-being limited by a stop formedby arack-bar 52. AIn this way the knives are swungsidewise on' a horizontal aXis throiiglifanare of about 1S() degrees, .The rack b'arf52 extends horizontally lengthpinions 53 (shown particularly by Fig. 9)

l attached to the trunnions 41. The rack bar 52 is reciprocated by a lever 54, F 4 and stud 63 engaged by a cam 57 on the shaft26. and a slot 58, Fig. 4, whichreceives a stud 59 on the rack bar. A spring 62 engaged with the lever" 54, holds the stud 63 on the lever 54 against the cam 57. The' cam 57 and spring 62 oscillatetlie lever 54, which movement of the rack is timed t`o"swing` the knife holders horizontally from the position inverted knives being thus swung edgewise lthrough an additional arc of 180 degrees to the honing position shown by Fig. 5.

It will appear by reference to Fig. 5 that the cams have concentric portions 46c which are of greater radius than the portion 46?, and support the lifting bar depressed below the posit-ion shown by Fig. 5, while the knife holders are swinging horizontally to their 50 will not touchthe knife holders until the latter have completed theirhorizontal movem'ent,-the lifting bar being then raised by position shown by Fig. 5. The vcylinder 14 is depressed'whil'e the blades are swinging horizontally and is raised to contact with theblades -after the horizontal swinging movement is completed. Since each hori- 6, and includes a vprojection 46EL and a' shown by Fig., 55.', The rocking arms'have projections which rest on the cams 46.V

the intermediate cani portions 46h to the' thearms 33 rest when the knives are being the lifting bar is supported in its lowest' wardly as indicated by Fig. 5a, until theV vertical position when they drop by gravita-l Fig. 6, to completethe 'inversion of thev wise-of themacliine, and its teeth engage 7, pivoted'at 55 to the base 1Q, and having a inturn reciprocates the rack bar 52. Each shown by Fig. 6 to that shown by Fig. 5, the

honing position, so that the bearing screws Zontal swingin movement of the knife holders is accomplished by la single movement oit Athe rack bar 52, it follows that the lmit'e holders are swung horizontally alternately to the right and to the lett.

1 will now describe the embodiment ot my invention shown by Figs. 10 to 19 inclusive. The shaft 16 of the grinding'v cylinder 14 has .a belt-driven pulley 32 as before. 130 represents the driving shaft having a'cain 131 which cooperates with a spring 132, a lever 133 and a grooved collar 134 in reciprocating the cylinder while it is rotating. Theblade holders are constructed like tho-se above described but are diiiierently inverted. The arm 33 of each holder is provided wit-h a trunnion 135 which is journaled in a bearing in a rocking block 136, the trunnionl being located at rightangles with the cutting edge ot the blade held by the holder and the blade being inverted by a partial rotation of the trunnion in the block 136 so that vthe blade is turned on an axis at right angles with its cutting edge, and passing therethrough and parallel to the Hatsides of the blade. The blocks 13G .are mounted to oscillate on a horizontal rod 137 supported by -ixed standards 138. To each trunnion 135 is attached a pinion 139. 140 represents an elongated rack bar, the teeth of which engage all the pinions 13, as shown by Figs. 10 and 11. The rack bar 140 is adapted to be reciprocated longitudinally on studs 141 attached to oscillatory arms 142 which are supported by the rod 137 and are adapted to be oscillated by cams 143 on the shatt130, the rack bar being pro vided with slots 144, Figs. 10, 11 and 13 through which the studs-141 pass, said slots permitting the rack bar to be reciprocated longitudinally. The arms 142, the blocks 136 with the blade holders supported thereby, and the rack bar 140 are adapted to be swung upwardly by the cams' 143 to raise the blades from the cylinder to the position indicated by Fig. 16. The rack bar 140 is moved endwise in one direction when in the raised position last described and is thus caused to impart a half rotation to the blade holders through the pinions 139 and thus invert the blades 15 and cause the sides which before faced outwardly, to race inwardly, and bear on the cylinder when the blade holders are returned to their honing posit-ion shown by Figs. 12, 14,15 and 17. The return ot the blade holders to their honing position is caused by gravitation when the cams 143 recede trom the arms 142, the holders swinging downwardly until the lades bea-r on the cylinder, which arrests the downward movement of the blades and holders before the completion of the downward movement of the arms 142 and rack bar 140, so that the rack bar is disengaged 'from the pinions 139, as shown by Figs. 14

and 15, before its return endwise movement, the blade holder-rotating movement of the rack bar occurring when the holders and rack bar are raised, and the teeth of the rack bar are engaged with the pinions 139, while the return movement ot the rack bar occurs when its teeth are separated from said pinions and the blades rest. on the cylinder. The mechanism which reciprocates the rack bar includes a cam 146 on the shaft 130, a lever 147, Fig. 13, pivoted at 148 and having 'a stud 1.45) bearing against the cam 146, and a. stud 150 at its upper end, a grooved sleeve 151 adapted to slide.on the xed rody 137 and engaging the stud 150, a rod 152 attached to the sleeve 151 and engaged with an arm 153 attached to the central portion Y of the rack bar, and a spring 154 attached to the lever 147 and to a iixed support (not shown) said spring pressing the upper arm of the lever toward the lett as viewed in Fig. 13, and acting through the sleeve 151 and rod 152 to move the rack bar in lthe same direction, the stud 149 being held against the cam, which therefore acts through thelever, sleeve, and rod. to move the rack bar in the opposite direction. 155 represents a fixed stop bar supported by posts 156 and provided with adjustable bearing screws 157 arranged to limit the downward movement-ot the blocks 130.115 shown by Fig. 13. Each block 136 is provided with ahandle 15S by which it may be swung independently to the position shown by dotted lines, Fig. 12, to press the arni ot the jaw 3G against a lixed stop bar 15h and thus release the hold oit the Jaws on the interposed blade and permit its easy removal.

'It will now 4be.seen thatin each embody ment of the invention the blades are held simultaneously against the cylinder until the inner sides of their cutting edges are treated, then separated from trie cylinder and inverted, and then simultaneously presented to the cylinder with untreated sideff; in Contact therewith, provision boing th made for the honing of the inner sides of a number of blades simultaneously and tor the successive presentation of the two sides of the series of blades to the cylinder, the operation of the machine being automatic after the insertion of the blades in the holders. i

1n each embodiment of the invention all the blade holders are adapted to swing simultaneously on an axis common to all the holders and arranged parallel with the axis of the cylinder, and each holder is adapted to swing about an independent axis formed by the trunnions 41, in the first-described embodiment, and by the trunnions'135 in the embodiment last described, operating mechanism being provided in each embodiment for swinging the holders simultaneously on their common axis, and for swing- LIS- 50 swing 'on axes parallel with the axis yof the. and on axes at' right angles with the axis of the cylinder ing the holders simultaneously about their independent axes. The-bearing blocks 40 and trunnions 41 are inl eect parts of the blade holders.

'Wliile the machine is intended tor. honing blades that have been previously ground to 4an approximately finished edge, it may be iised or adapted for" use in sharpening blades which have not .been z previously lit ground, without departing: from the spirit ofthe invention- I claim;

S 1. In a machine of the character "stated, the combination of a rotary sharpening cyl'- inder, a series of movable blade holders adapted to hold aplurality oipblades,simul-A taneously against' the' cylinder, said holders being adapted to swing ii! unison onan'axis common to' all the holders and parallel with the axisof the cylinder, andeach holder being adapted to swing aboutv an independent' axis at right anglesfwith the -axis of the cylinder, and holder-operating mechanism having means; for causing 'simultaneous swinging movements of the holders o n their common'jaxis, and means fon causing. simultaneous swinging movements of the holders v 2'. In' amachine of the character stated, Ithe combination of a rotary harpening cylinder, la series of movable adapted to holda plurality of blades simultaneously against the cylinder, said, holders about their independent axes..

, beingadapted to swing in unison on an axis i I right angles with the axis of.

common to allthe holders and parallel with the axis of the cylinder, and each holder b'e-l ing providedwith a journaled trunnion constituting 'an independent axis cylinder to invert the blades,

blade holders to`move the blades edgewise into 'position for sharpening, andmechanism for successively swinging the blade holders' ony said 4. In a machine of the character lstated the combination of a rotary sharpening cyl a series of blade holders adapted to inder,

swing on axes parallel with the axis of the cylinder to invert the blades, andjon'a-xes right angles with the. axis of the cylinder to move the' bladesedgewi'se into position:

for sharpening, mechanism for successively swinging the blade holders on said axes, and;l

" mechanism for alternately depressing and' raising .the cylinder. l

5. A machine of'tliecharacter stated/ coni'- prising aI rotarysharpening cylinder-,a se-:fj ries of blade'holders, means pivotally con-A necting said holders withfixed supports'- the 'cylinder,said. means having for permitting the holders to adjacent to provisions swing onv horizontal 'axes parallel with the.

axis of the cylinder, and-on verticalfaxes at l' right angles with the' axis of thel cylinder, a lifting bar/adapted to simultaneously penvgage the series of holders, means yfor movto simultaneously swing the ing said bar and means holders on their horizontal axes,

for simultaneously Iswinging v the' holders on their vertical axes.

6. In' a machine of lthecliaracter stated, 'L

the combination of a rotary sharpenin'gcylinder, a' series of bearing arms rigidly sup,- portedat one side ofthe cylinder, a series of bearing blocks adaptedto turn onfsaid arms, a series of blade holders adaptedto swingon said bearing blocks, a lifting'bar adaptedA to'siinultaneously engage said holdyers andl swing them from the cylinder to a position to cause a .further swinging 'movement of the holdersby. gravitatiomvmeans for'raisin and depressing saidbar, means for arresting the gravitat-ing movement of the holders, and means for simultaneously turning the bearing holders into positionjover the cylinder.

In testimony whereof I have afiixed my signature, in presence of two witnesses. y HANS CHRISTIANSEN;

Witnesses IMMAN'UEL Prnii'nrnii, Jr., JOHN l?. G UPPY.

blocks vto .move the 

